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Definition of Neutrophil

Neutrophil: A type of white blood cell, specifically a form of granulocyte, filled with neutrally-staining granules, tiny sacs of enzymes that help the cell to kill and digest microorganisms it has engulfed by phagocytosis. The mature neutrophil has a segmented nucleus (it is called a seg or poly) while the immature neutrophil has band-shape nucleus (it is called a band). The neutrophil has a lifespan of about 3 days.

Neutrophilia, an increased proportion of neutrophils in the blood, is a common finding with acute bacterial infections.

Neutropenia, a decreased proportion of neutrophils, may be seen with viral infections and after radiotherapy and chemotherapy. Neutropenia lowers the immunologic barrier to bacterial and fungal infection.

Also referred to as neutrophils

Source: MedTerms™ Medical Dictionary
http://www.medterms.com/script/main/art.asp?articlekey=4561
Last Editorial Review: 3/17/2002


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